1.
J Org Chem
; 74(20): 7665-74, 2009 Oct 16.
Article
in English
| MEDLINE
| ID: mdl-19769335
ABSTRACT
An efficient and highly convergent synthesis of the monomeric counterpart of the antitumor-antibiotic marine natural product marinomycin A was achieved by using optically active titanium complexes to control the configuration of the stereogenic centers, a highly stereo- and regioselective cross-metathesis to generate the (E)-configured C20-C21 double bond, and a Horner-Wadsworth-Emmons olefination followed by a Pd-catalyzed Stille cross-coupling to construct the tetraene moiety.
Subject(s)
Alkenes/chemistry , Antineoplastic Agents/chemical synthesis , Macrolides/chemistry , Antineoplastic Agents/chemistry , Catalysis , Dimerization , Molecular Structure , Palladium/chemistry
2.
Chem Commun (Camb)
; (6): 775-7, 2005 Feb 14.
Article
in English
| MEDLINE
| ID: mdl-15685334
ABSTRACT
Catalytic allyltitanation reactions were accomplished from dienes and aldehydes with only 5% of titanocene complexes at the expense of employing stoichiometric amounts of PMHS.